The epic regulator

I'm bored as ever, and I'll probably get an epic in a few months, so here goes. How do you adjust the Prevent reg? What is it set at by the factory? Is it easy to adjust? How will I have to adjust it when I get an epic and screw in my CO2 tank? Does it screw over your gun when CO2 freezes it? Thanks for any answers.

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ARTHUR: No! Not the Knights Who Say 'Ni'!
HEAD KNIGHT: The same!
BEDEVERE: Who are they?
HEAD KNIGHT: We are the keepers of the sacred words: 'Ni', 'Peng', and 'Neee-wom'!
RANDOM: Neee-wom!

From what I know there is a screw on the grip frame, I think near the asa that you adjust your reg with. I know on older epics it was on the bottem but Jim has changed that.
The prevent reg is pretty much built for co2. If liquid gets into the gun, it wll over pressize and vent out the exes pressure before each shot.